The Anchor Audio GG2-XU4 is a portable sound system with built-in Bluetooth AIR transmitter and two dual wireless mic receivers. The speaker reaches crowds of 500+ with its 109 dB of clear sound and powerful 75W AC and 50W DC modes. The Go getter can connect up to two built-in wireless receivers and comes with standard built-in Bluetooth. This unit features two universal microphone jack inputs and a 3.5 mm AUX line input. The speaker features one high-output horn tweeter and one 6.5" woven fiber woofer. The Air unit features One built-in AIR wireless companion transmitter an one built-in AIR wireless receiver. This unit is expandable to mutliple AIR battery powered wireless companion speakers and easily connects to Assistive Listening devices (ADA Compliant). Built-in rechargeable batteries operate 6 - 8 hours on a single charge and features alternate wired and wireless mode. External speaker output powers optional Go Getter unpowered or AIR companion speaker.